Press for producing hollow bodies



K. BHLE PRESS FOR PRODUCING HOLLOW BODIES oct. 16, 1923. I 1,470,593

Filed Dec. 6. 1920 2 Sheets-Sheret 1 l2l1 y e? e1 i @e B lll C l f///Z/j/ Il1 C 'du-i U" D \'A D F|g.1. j' `i yf* ,fl/ig '7| j" l lesg, 66e/e312"-- m-fz- @f E f/ '-'T-"ffe s lll:6 Y Fl I e1 (is e? 7B 111W; w" I Cg i i l# I l *FA i lll D s D f* 1;; ezesf f2 f2 l] esem v 3E Eej: .e Iees iff-ff f, #f5 f5 v ifs, f6 I y QF /lzfenf/f Oct. 16 1923.

K; BHLE PRESS FOR PRODUCING HOLLOW BODIES Filed Dc. e. l1920 2Sheets-Sheet 2 Patented oct. 1e, 1923.

Wasn i inviten srAres- Parent orties.

KARL BHLn, or

ESSEN, GERMANY, AssIGNoR To FRIED. KRUPP AKTIENGESELL- serrare, ornssnN-oN-THE-RUHR, GERMANY.

PRESS FOR PRODUCING HOLLOW BODIES.

Application filed December 6, 1920.v Serial No. 428,645.

useful Improvement in Presses for Pro` during Hollow Bodies, ot' whichthe following' is a specification.

T he present invention relates to presses for producing hollow bodies, ablanking or shearing punch being provided tor the cutting` of the stockto lts correct size before the actual pressing takes place. The mainobject of the invention isto provide a shearing or blankingpunch,iadapted to be locked to the die` and to embrace the i presspunch' in such manner that it fan serve as a stripping member for the'inished stock when the wardly.

This new construction also provides several other advantages, whichwillbeftully described in the following.

One embodiment n of the invention is shown in the drawing, illustrating`a press for manufacturing hollow bodies of circular shape.

Fig. l shows in longitudinal section certain parts of the press; p

F igrs. 2 to 4 are views similaito Fig'. l, showing the same partsV indifferent positions; and

Fig. 5 is a partial side View seen from the lett. corresponding` toFigs. 3 and 4.

The hollow cylindrical press punchi-i is rigidly connected with a plateB, on the under side of which 'followers D or" angula shape are hingedto the plate by means of screw bolts C. Bolts c, provided with nuts (fat the upper end, run with play through the plate B. These bolts carryat their lower ends a shearing or blanlring punch IC of T-shapedcross-section. liVith onl)v slight play the horizontal portion c2 of theshearing punch E embraces the press punch A, and the inner lower edge etof the vertical arm c3 of the blanking punch E is constructed. as acutting or shearing edge.

rlhe die F is provided with a projection f on its upper side towards theblanking punch, the outer edge f2 of which is shaped as a cutting edgewhich is intended to cooperate with the cutting edge c* ot theblanlring` punch E. Two ring-sector shaped' ribs f7 and f8 (see Fig. 5)are moreover press punch is "moved rearyouter `portion of the stocksheet Il. sheared oif portion or the sheet falls down connected by meansor" screws fto the die `F, these ribs being situated in thesa-me plane.ln the two diagonally oppositelv `located grooves formed between theribsf7 `and f8 a knife fhaving a V-shaped edge, 1s inserted `tor the purposethat they' shall cooperate with the notches c6 on thelo'wer side of thevertical arm e3 of the blanlring punch E (see Fig'.` 5). Furthermore.the pegs f4 are connected with the die F, which pegs projectthroughholes c5 in the blanlriner punch E with small play, `each ofwhich beingr provided with a small hole These holes f5 are vintended toyreceive the titollower pins G, and are arranged in such a manner thatthe)T lie above the upper surface o1" the blankingr punch E, with thepress in the position in which the knives have entered the notches e6(see Figs. 3, 4 and Before operation the followersD are swung inwardsagainst the longitudinal axis ofthe press until they have the positionshown in Figs. l and 2vf'herein'they couple together the press punch Awith the blanlring-punch E through the intermediary ot the plate B, whenthe press punch goes down. The stock (sheet H) previously warmed to redheat and. intended for the manufacture of` the hollow body, is nowplaced on the die .F and the press set in action.`` The blanlring punchE then lirst arrives in Contact with thesheet H l),

whereupon, during further travel down wards,

of the press punch A, the cutting edges e* and f2 come into action,shearingy off the The and lies on the knives Towares the end ofthedownward movement ot the blanking die E the knives f3 will. functionwith `the grooves eGr of vthe vertical arm e3 et the blankiingr die (seeFig. 2). so that the cut oil? portion it (see Fig. 5) ot the stock sheetiscut in half` and` may consequent-ly be readily removed. i

The press is now stopped and the followers D swungoutwards, whereuponthe coupling between the press punchA andthe blanlring` punch E isdisconnected.

rlhe press is then again set in motion. The blanlring punch remainsstationary, but the press punch A. continues its travel andv pressesclown the stock plate H in the pins (l removed Jfrom the holes 7".

die, whereupon the hollow body to be produced is 'formed in well-knownmanner from the stock plate.

Upon completion of the actual pressing operation the press is againstopped, whereupon the pins Gr aye inserted in the holes of the pegs ft.The blanking punch E is thus secured to the die F. The parts then havethe relative positions shown in Fig. 3. During the upstroke of the presspunch, the finished pressed plate adhering to the press punch thenstrikes against the horizontal portion c2 ot the blanking die E (seeFig. l), so that during continued movement up ward o-E the press punchit will be pushed oil the latter. As soon as this has taken place, thepress is again stopped and the Towards the end of thc return stroke ofthe press 'pr-inch the plate B abuts against the nuts c7 oi Jthe bolts cand carries the blanking punch lil into its initial position through theintermediary of the bolts. When the press stamp A has arrived in itsinitial position the Jfollowers D will again. be swung inwards and thepress is then again .ready to start.

Claims.

l. A press for producing hollow bodies comprising a die, a press punch,a blanking punch having blanking means and embracing the press punch forystripping the finished stock oli' the press punch during the rearwardstroke, means for locking the blanking punch to the die and means forlocking the blanking punch to the press punch in a readily detachablemanner.

2. A press for producing hollow bodies comprising a die, a press punch,a blanking punch, and knives mounted on said die and arranged in thepath of the blanking punch, said knives contacting with said blankingpunch to cut the outer portion (previously sheared ofi' from the stock)into several pieces.

3. A press for producing hollow bodies comprising a die, a press punch,a blanking punch vhaving blanking means and embracing `the press punchfor stripping the finished stock Off the press punch during the rearwardstroke, followers connected to the press punch, said followers beingadapted to be swung outwards and t0 couple together the press punch andthe b-lanking punch in the direction of the pressing stroke of the presspunch, and means for locking the hlanking punch to the die in a readilydetachable manner.

The foregoing 'specification signed at Essen, Germany, this 26th day ofAugust, 1920.

KARL BHLE.

ln presence of- HANs GoT'TsMANN,

JOHANN DECKERS.

